MACS

=Maximum Adjacent Cut Specification=

The Maximum Adjacent Cut Specification (or MACS) of a lock is the maximum variance of component sizes between two adjacent components. This term is primarily used in pin-tumbler and wafer locks to define restrictions on the number of real key differs to ensure the proper operation of the lock. Failure to abide by the MACS can make keys difficult to insert or remove from a lock, potentially even causing back cutting.